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Seminar Details

Date 5-6-2007
Time 11:00
Room/Location DISI- Sala conferenze 322-3 piano
Title Movie Denoising by Average of Warped Lines
Speaker Dott. Marcelo Bertalmio
Affiliation Universitat Pompeu Fabra, Barcelona, Spain
Link http://www.upf.edu/english/web/
Abstract In this talk we will present an efficient method for movie denoising that does not require any motion estimation. The method is based on the well known fact that averaging several realizations of a random variable reduces the variance. For each pixel to be denoised we look for close similar samples along the level surface passing through it. With these similar samples we estimate the denoised pixel. The method to find close similar samples is done via warping lines in spatio-temporal neighborhoods. For that end we will present an algorithm based on a method for epipolar line matching in stereo pairs which has complexity O(N) where N is the number of columns in the image. In this way the algorithm is computationally efficient. Furthermore, we will show that the presented method is unsupervised and can deal with different types of noise while respecting the visual details on the movie frames.
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